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ROC, FROC and AFROC

To: <s-news@lists.biostat.wustl.edu>
Subject: ROC, FROC and AFROC
From: "Trevor Hastie" <hastie@stat.stanford.edu>
Date: Thu, 20 Sep 2001 11:13:28 -0700
I am looking for some Splus or R  code to do a FROC analysis, in particular
a comparison of the diagnostic ability of two groups. From what I have been able to glean from the couple
of papers that my radioligist consultee has given me to read, FROC stands for "Free Response ROC",
and it arises in radiology where the screener may find none, one, or more than one
abnormality, and rates each of them. This distinguishes it from the case where ROC
analysis is popular, where the unit of measurement is the X-ray or image.
 
I am open to other approaches as well.
Thanks
 
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  Trevor Hastie                             hastie@stat.stanford.edu 
  Professor, Department of Statistics, Stanford University
  Phone: (650) 725-2231 (Statistics)          Fax: (650) 725-8977 
  (650) 498-5233 (Biostatistics)   Fax: (650) 725-6951
  URL: http://www-stat.stanford.edu/~hastie 
  address: room 104, Department of Statistics, Sequoia Hall
           390 Serra Mall, Stanford University, CA 94305-4065 
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